Explanation:
The two digit numbers can be broken up into a stem representing the tens digit, and the leaf is the units digit. A stem of 8 would have multiple leaves because there are a lot of values in the 80s. Something like 36 only has one stem and leaf since there aren't any other values in the 30s listed.
Note how 36 is the smallest number (min) so the smallest stem is 3. The largest number (max) is 99, so the largest stem is 9. The stems range from 3 to 9.
